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24 * Copyright (c) 2012, Intel Corporation.
25 * Use is subject to license terms.
28 #ifndef _LUSTRE_QUOTA_H
29 #define _LUSTRE_QUOTA_H
31 /** \defgroup quota quota
35 #if defined(__linux__)
36 #include <linux/lustre_quota.h>
39 #include <dt_object.h>
40 #include <lustre_fid.h>
41 #include <lustre_dlm.h>
44 #define MAX_IQ_TIME 604800 /* (7*24*60*60) 1 week */
48 #define MAX_DQ_TIME 604800 /* (7*24*60*60) 1 week */
51 struct lquota_id_info;
54 /* Gather all quota record type in an union that can be used to read any records
55 * from disk. All fields of these records must be 64-bit aligned, otherwise the
56 * OSD layer may swab them incorrectly. */
58 struct lquota_glb_rec lqr_glb_rec;
59 struct lquota_slv_rec lqr_slv_rec;
60 struct lquota_acct_rec lqr_acct_rec;
63 /* Index features supported by the global index objects
64 * Only used for migration purpose and should be removed once on-disk migration
65 * is no longer needed */
66 extern struct dt_index_features dt_quota_iusr_features;
67 extern struct dt_index_features dt_quota_busr_features;
68 extern struct dt_index_features dt_quota_igrp_features;
69 extern struct dt_index_features dt_quota_bgrp_features;
71 /* Name used in the configuration logs to identify the default metadata pool
72 * (composed of all the MDTs, with pool ID 0) and the default data pool (all
73 * the OSTs, with pool ID 0 too). */
74 #define QUOTA_METAPOOL_NAME "mdt="
75 #define QUOTA_DATAPOOL_NAME "ost="
78 * Quota Master Target support
81 /* Request handlers for quota master operations.
82 * This is used by the MDT to pass quota/lock requests to the quota master
83 * target. This won't be needed any more once the QMT is a real target and
84 * does not rely any more on the MDT service threads and namespace. */
86 /* Handle quotactl request from client. */
87 int (*qmth_quotactl)(const struct lu_env *, struct lu_device *,
88 struct obd_quotactl *);
90 /* Handle dqacq/dqrel request from slave. */
91 int (*qmth_dqacq)(const struct lu_env *, struct lu_device *,
92 struct ptlrpc_request *);
94 /* LDLM intent policy associated with quota locks */
95 int (*qmth_intent_policy)(const struct lu_env *, struct lu_device *,
96 struct ptlrpc_request *, struct ldlm_lock **,
99 /* Initialize LVB of ldlm resource associated with quota objects */
100 int (*qmth_lvbo_init)(struct lu_device *, struct ldlm_resource *);
102 /* Update LVB of ldlm resource associated with quota objects */
103 int (*qmth_lvbo_update)(struct lu_device *, struct ldlm_resource *,
104 struct ptlrpc_request *, int);
106 /* Return size of LVB to be packed in ldlm message */
107 int (*qmth_lvbo_size)(struct lu_device *, struct ldlm_lock *);
109 /* Fill request buffer with lvb */
110 int (*qmth_lvbo_fill)(struct lu_device *, struct ldlm_lock *, void *,
113 /* Free lvb associated with ldlm resource */
114 int (*qmth_lvbo_free)(struct lu_device *, struct ldlm_resource *);
117 /* actual handlers are defined in lustre/quota/qmt_handler.c */
118 extern struct qmt_handlers qmt_hdls;
121 * Quota enforcement support on slaves
126 /* The quota slave feature is implemented under the form of a library.
127 * The API is the following:
129 * - qsd_init(): the user (mostly the OSD layer) should first allocate a qsd
130 * instance via qsd_init(). This creates all required structures
131 * to manage quota enforcement for this target and performs all
132 * low-level initialization which does not involve any lustre
133 * object. qsd_init() should typically be called when the OSD
136 * - qsd_prepare(): This sets up on-disk objects associated with the quota slave
137 * feature and initiates the quota reintegration procedure if
138 * needed. qsd_prepare() should typically be called when
139 * ->ldo_prepare is invoked.
141 * - qsd_start(): a qsd instance should be started once recovery is completed
142 * (i.e. when ->ldo_recovery_complete is called). This is used
143 * to notify the qsd layer that quota should now be enforced
144 * again via the qsd_op_begin/end functions. The last step of the
145 * reintegration prodecure (namely usage reconciliation) will be
146 * completed during start.
148 * - qsd_fini(): is used to release a qsd_instance structure allocated with
149 * qsd_init(). This releases all quota slave objects and frees the
150 * structures associated with the qsd_instance.
152 * - qsd_op_begin(): is used to enforce quota, it must be called in the
153 * declaration of each operation. qsd_op_end() should then be
154 * invoked later once all operations have been completed in
155 * order to release/adjust the quota space.
156 * Running qsd_op_begin() before qsd_start() isn't fatal and
157 * will return success.
158 * Once qsd_start() has been run, qsd_op_begin() will block
159 * until the reintegration procedure is completed.
161 * - qsd_op_end(): performs the post operation quota processing. This must be
162 * called after the operation transaction stopped.
163 * While qsd_op_begin() must be invoked each time a new
164 * operation is declared, qsd_op_end() should be called only
165 * once for the whole transaction.
167 * - qsd_op_adjust(): triggers pre-acquire/release if necessary.
169 * Below are the function prototypes to be used by OSD layer to manage quota
170 * enforcement. Arguments are documented where each function is defined. */
172 struct qsd_instance *qsd_init(const struct lu_env *, char *, struct dt_device *,
173 cfs_proc_dir_entry_t *);
174 int qsd_prepare(const struct lu_env *, struct qsd_instance *);
175 int qsd_start(const struct lu_env *, struct qsd_instance *);
176 void qsd_fini(const struct lu_env *, struct qsd_instance *);
177 int qsd_op_begin(const struct lu_env *, struct qsd_instance *,
178 struct lquota_trans *, struct lquota_id_info *, int *);
179 void qsd_op_end(const struct lu_env *, struct qsd_instance *,
180 struct lquota_trans *);
181 void qsd_op_adjust(const struct lu_env *, struct qsd_instance *,
182 union lquota_id *, int);
183 /* This is exported for the ldiskfs quota migration only,
184 * see convert_quota_file() */
185 int lquota_disk_write_glb(const struct lu_env *, struct dt_object *,
186 __u64, struct lquota_glb_rec *);
189 * Quota information attached to a transaction
194 struct lquota_id_info {
195 /* quota identifier */
196 union lquota_id lqi_id;
198 /* USRQUOTA or GRPQUOTA for now, could be expanded for
199 * directory quota or other types later. */
202 /* inodes or kbytes to be consumed or released, it could
203 * be negative when releasing space. */
206 /* quota slave entry structure associated with this ID */
207 struct lquota_entry *lqi_qentry;
209 /* whether we are reporting blocks or inodes */
213 /* Since we enforce only inode quota in meta pool (MDTs), and block quota in
214 * data pool (OSTs), there are at most 4 quota ids being enforced in a single
215 * transaction, which is chown transaction:
216 * original uid and gid, new uid and gid.
218 * This value might need to be revised when directory quota is added. */
219 #define QUOTA_MAX_TRANSIDS 4
221 /* all qids involved in a single transaction */
222 struct lquota_trans {
223 unsigned short lqt_id_cnt;
224 struct lquota_id_info lqt_ids[QUOTA_MAX_TRANSIDS];
227 /* flags for quota local enforcement */
228 #define QUOTA_FL_OVER_USRQUOTA 0x01
229 #define QUOTA_FL_OVER_GRPQUOTA 0x02
230 #define QUOTA_FL_SYNC 0x04
232 #define IS_LQUOTA_RES(res) \
233 (res->lr_name.name[LUSTRE_RES_ID_SEQ_OFF] == FID_SEQ_QUOTA || \
234 res->lr_name.name[LUSTRE_RES_ID_SEQ_OFF] == FID_SEQ_QUOTA_GLB)
236 /* helper function used by MDT & OFD to retrieve quota accounting information
238 int lquotactl_slv(const struct lu_env *, struct dt_device *,
239 struct obd_quotactl *);
241 #endif /* _LUSTRE_QUOTA_H */